Cache Memory

Cache Memory :- It is a special very high speed memory sometimes it is used to increase  the speed of processing by making current programs and data available to the CPU at a rapid rate. The cache memory is employed in computer systems to compensate for the speed differential between main memory access time and processor logic. CPU logic is usually faster than main memory access time, with the result that processing speed is limited primarily by the speed of main memory.

A technique used to compensate for the mismatch in operating speeds is to employ on extremely fast, small cache memory between the CPU and main memory whose access time is close to processor logic clock cycle time. The cache is used for storing segments of programs currently being executed in the CPU and temporary data frequently needed in the present calculations. By making programs and data available at a rapid rate, it is possible to increase the performance rate of the computer.

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